Groups iOS regexes in gitignore.

PiperOrigin-RevId: 245838235

.gitignore

@@ -20,18 +20,8 @@ tensorflow/contrib/cmake/_build/
 [Bb]uild/
 /tensorflow/core/util/version_info.cc
 /tensorflow/python/framework/fast_tensor_util.cpp
-Pods
-Podfile.lock
-*.pbxproj
-*.xcworkspacedata
-/*.podspec
-/tensorflow/lite/experimental/objc/BUILD
-/tensorflow/lite/experimental/swift/BUILD
-/tensorflow/lite/examples/ios/simple/data/*.txt
-/tensorflow/lite/examples/ios/simple/data/*.tflite
 /tensorflow/lite/gen/**
 /tensorflow/lite/tools/make/downloads/**
-xcuserdata/**
 /api_init_files_list.txt
 /estimator_api_init_files_list.txt
 *.whl
@@ -42,3 +32,16 @@ xcuserdata/**
 *.iml
 local.properties
 gradleBuild
+
+# iOS
+Podfile.lock
+Pods
+*.pbxproj
+*.xcworkspacedata
+/*.podspec
+/tensorflow/lite/**/ios/BUILD
+/tensorflow/lite/**/objc/BUILD
+/tensorflow/lite/**/swift/BUILD
+/tensorflow/lite/examples/ios/simple/data/*.tflite
+/tensorflow/lite/examples/ios/simple/data/*.txt
+xcuserdata/**